The automation works with any battery charging system. It needs to input an actual battery-soc (soc before charging) and a final battery-soc (soc after charging). I use the automation to charge my pedelec. It is based on an open-loop-control as it does not work with any internal data from the battery. The automation “estimates” the charging time based on a really simple algorithm which is just the difference between final soc and actual soc multiplied by 2.5 (minutes). Example: Actual soc is 40%, final soc should be 80%, the charging time is calculated/estimated to (80-40) * 2.5 minutes = 100 minutes. The factor 2.5 ist based on the observation I made with my BOSCH 750 Wh battery. Since two years it works fine for me. The factor can easily adapted depending on battery and charging device.
The calculated charging time is displayed in the input-dialogue and when the charging has been startet a timer is active. The timer stops charging when the calculated charging time has passed regardless of the soc finally achieved. The algorithm has proven to hit the chosen final soc almost in every charging process. By setting up the inputnumber it is possible to define max and min-values for actual soc and final soc.
What is necessary to do:
- create two inputnumbers (helper) per pedelec you want to charge: one for actual soc and one for final soc
- create a timer (helper) per pedelec
- add a template sensor in your configuration.yaml to calculate the charging time
- sensor:
- name: ladezeitakku1
state: "{{ ((float(states('input_number.pedelec1_soc_final')) - float(states('input_number.pedelec1_soc_actual'))) * 2.5) | int }}"
- set up the dialogue as an entity-card
type: entities
entities:
- entity: input_number.pedelec1_soc_actual
name: Ladestand Anfang (max.80% zul.,siehe Helfer)
- entity: input_number.pedelec1_soc_final
name: Ladestand Ende
- entity: sensor.ladezeitakku1
name: kalk. Ladezeit in min.
icon: mdi:clock
- entity: switch.zwischenstecker_e_bike_ladegerat_1_switch_0
name: Starte Ladevorgang
icon: mdi:clock-start
- entity: timer.timerladezeitakku1
name: verbl. Ladezeit in hh:mm:ss
title: E-Bike 1
state_color: true
- set up the automation
alias: Laden E-Bike 1
description: Startet den Ladevorgang von E-Bike Akku1 und schaltet bei Ladeende ab
triggers:
- entity_id:
- switch.zwischenstecker_e_bike_ladegerat_1_switch_0
from:
- "off"
to:
- "on"
id: start
trigger: state
- entity_id: timer.timerladezeitakku1
from: active
to: idle
id: finish
trigger: state
- entity_id:
- switch.zwischenstecker_e_bike_ladegerat_1_switch_0
from:
- Ein
to:
- "off"
id: beendenmanuell
trigger: state
actions:
- choose:
- conditions:
- condition: trigger
id: start
sequence:
- data:
duration: >-
{% set minutes = states('sensor.ladezeitakku1')| int %} {{
(minutes * 60) | int | timestamp_custom('%H:%M', false) }}
action: timer.start
target:
entity_id: timer.timerladezeitakku1
- conditions:
- condition: trigger
id:
- finish
sequence:
- action: switch.turn_off
target:
device_id: device_id_of_your_remote_plug
data: {}
- conditions:
- condition: trigger
id:
- beendenmanuell
sequence:
- action: timer.finish
metadata: {}
target:
entity_id: timer.timerladezeitakku1
data: {}
mode: restart
- set up a remote plug (e.g. shelly plug plus) to connect/disconnect the charging device from the supply-net.